Double-sided simplex hydraulic transmission combination machine tool

The floating surface simplex hydraulic transmission combined machine tool is shown in Figure 2-lla. The electrical control circuit is
shown in Figure Z-llb. The double-sided simplex hydraulic transmission combined machine tool is driven by three electric motors: left and right power head motors M1 and
M2 and cooling pump motor M3. In the control circuit of the double-sided simplex hydraulic transmission combined machine
tool, the manual switch SA1 is the independent adjustment switch for the left power head, SA2 is
the independent adjustment switch for the right power head, and SA3 is the work selection switch of the cooling pump motor. ,
    when the left and right power heads are in their original positions. The limit switches ST l., ST2, ST3, ST4,
ST5 and ST6 are pressed.
    When the machine tool is required to work, move the manual switches SA1 and SA2 to the automatic cycle position, press
the machine tool start button S B2, and contact the contactors KM1 and KM2. The Xinjiang electricity is closed and self-locking, its main contact
is closed, and the left and right power head motors M1 and M2 start running. Then press the "forward" button
SB3, the intermediate relays Kl and K2 are energized to close and self-locking, the solenoid valves YV1 and YV3 coils are energized
, and the left and right power heads leave their original positions and move forward quickly. At this time, the limit switches sri, ST2, ST5, and ST6 are reset first, and then the limit switches
ST3 and ST4 are also reset.